Red Rose Music Mark Levinson Model 3 Preamplifiers

RED ROSE MUSIC Model 3 Tube Line Preamplifier with External Power Supply by Mark Levinson I bought lots of red rose amp during a closing out the store in LA back in 90s. Most of amp I've been using, I've sold it to audiogon. This is one of New old stock but when I open the box and try to test it I can't get the power on I don't know why maybe it's been sitting in the box for long time? so I decide to sell it as is. if you have good knowledge about repairing this would be the good chance to have good quality of amp because this is discontinue model Specifications: •Frequency response: 3 Hz ~ 300 kHz, -3dB •Input impedance: 20 k Ohms •Gain: 22 dB 1 kHz •Stereo separation: > 90 dB from 3 Hz to 100 kHz •Total harmonic distortion: 96 dB SN Ref. 1V •Number of inputs: 5 RCA (per channel) unbalanced signal inputs •Number of outputs: 2 RCA (per channel) unbalanced signal outputs •Tape outputs: 2 RCA unbalanced and unbuffered, switchable •Tube complement: 2 each 6DJ8 (gain stage), 2 each 12AU7/5814 (output stage) •Dimension of main unit: Height: 4 in (10 cm), Width: 17 in (48.5 cm), Depth: 12.5 in (44.5 cm) •Dimension of power supply: Height: 3 in (7.6 cm), Width: 5 in (13 cm), Depth: 10.5" (4.6 cm) •Weight: Pre-amplifier: 17 lb (7.3 kg) •Power supply: 15 lb (5.5 kg) •Shipping weight, Main unit: 20 lb (13.6 kg); Power supply: 18 lb (8.2 kg)